Which of the following is not a colligative property of a solution?
a. boiling point elevation
b. density
c. vapor pressure lowering
d. freezing point depression

The correct answer is (b.) density. Colligative properties are more concerned about the ratio between the number of particles of the solute and solvent in rather than the type of chemical or element present. Since boiling point elevation, vapor and osmotic pressure lowering and freezing point depression are considered as one of the colligative properties, it is definitely the density that does not belong to the group.

Which of the following did you identify correctly